Bypassing HTTP Signature Verification in Misskey by Misskey Development Team
CVE-2026-28432

7.1HIGH

Key Information:

Vendor

Misskey-dev

Status
Misskey
Vendor
CVE Published:
9 March 2026

What is CVE-2026-28432?

Misskey, an open source federated social media platform, is susceptible to a vulnerability that permits the circumvention of HTTP signature verification across all instances, regardless of federation settings. This flaw affects all versions prior to 2026.3.1. Users and administrators should ensure that they update their installations to the latest version to mitigate potential security risks associated with this vulnerability.

Affected Version(s)

misskey < 2026.3.1

References

https://github.com/misskey-dev/misskey/security/advisorie...
x_refsource_CONFIRM

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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